Can you use malewarebytes and spybot S&D as on demand scanners with Norton Products?

Norton Security | Norton Internet Security
1

Not to keep them as active antispyware products but to use on demand to scan

 

Also are these two items malewarebytes and SB S&D antivirus or anti spyware?

I have SB S&D on my machine but where do i get malewarebytes from?

 

thanks in advance